Improvement in feed-water-regulating valves



. .E. 0. da SILVA. Feed-Water Regulating-Valve.

No. 208,992.. Patented om. 15,1878.

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N.PEYER$. PHOTO LITHOGRAPHER WASHINGTON. D.C.

,SILVA, engineer, of Rio de Janeiro, Brazil,

' bodying the said improvements and applied UNITED STATES EDUARDOOLAUDIO. DA SILVA PATENT OFFICE.

,0]? RIO DE JANEIRO, BRAZIL.

IMPROVEMENT IN FEED-WATER-REGULATING VALVES.

Specification forming part of Letters Patent No. 208,992, dated October15, 1878; application filed September 19, 1878; patented To all whom itmay concern:

Be it known that I, EDUARDO GLAUDIo DA have invented certain new anduseful Improvements in Feed-Regulating Valves; and I do hereby declarethat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

My improvements, which are in part patented in England, February 3,1877, under the No. 460, relate to apparatus for regulating the supplyof water to steam-boilers, and are at the same time applicable toregulate the discharge of water from steam-pipes or fromsteam-reservoirs.

In order that my improvements be clearly understood, I will describe indetail the construction and working of an apparatus emto regulating theadmission of feed-water supplied to a boiler by any ordinary feed-pump,in conjunction with the four figures of the accompanyingdrawing, ofwhich- Figure l is a plan, in section, through AA, Fig. 2, lookingupward; Fig. 2, a front elevation, in section, through E B, Fig. 1; Fig.3, an elevation of the orifice of admission of the feed-water to theapparatus; and Fig. 4., a lateral elevation of the apparatus, partiallyin section and on a smaller scale, showing a mode of attaching the sameto a boiler.

As shown in these figures, the apparatus consists in a metalliccylinder, 0, closed above by a cover, 0, a flexible diaphragm ofcaoutchouc or other appropriate material, 0 being secured between thetwo parts by means of the bolts and nuts 0. The upper face of thisdiaphragm is in connection withthe level of the water-line by means ofthe pipe f and concentric passage f, and its lower face is in connectionwith the water below the water-line by means of the central pipe g.Directly over this central pipe 9 there is a doublebeat valve, 1), tothe stem of which is attached a spring, 8, having a tendency to raisethe valve up against its seats, while the upper end of its stem is in inEngland, February 3, 1877.

contact against a plate, 0*, screwed up against the under face of thediaphragm. This doublebeat valve 1; admits or intercepts the feedwa-ter(directed by a force-pump into the nozzle N) to the central pipe, g,according to whether the diaphragm is up or down in the cylinder 0. Forthe purposes of inspection while under steam, cocks may be placed one inthe upper T of the pipe, 9, and another in the pipe f, by means of whichthe apparatus is disconnected from the boiler; but in such case it isadvisable that these two cocks be connected so that they close and opentogether. The spring 8 serves to raise the valve 1) and the diaphragmwhen not acted on by the column of water in the central tube, g.

The action of this apparatus when used for regulating the supply ofwater to a steamboiler'is as follows: The diaphragm O is drawn down inthe cylinder 0 by the column of water in the central tube, 9, theconcentric passage f being unsealed below and containing steam, thevalve 1; being lowered, and

consequently the apparatus is feeding. WVhen not feeding, the diaphragm(1 being pushed up by the spring 8, as shown in Fig. 2, the lower end ofthe concentric passage f being sealed by the water-line, the steam in itis condensed by the colder water in the central pipe, g, which issurrounded by the pipe f. Consequently the water rises, in f and f, thedoublebeat valve 1) being thereby raised against its seats, interceptingthe feed until, the water in the boiler falling again below the pipe f,it is replaced by steam. Then the diaphragm C is again drawn down by thecolumn of water in the central pipe, g, and the apparatus commences tofeed again, and so on, thus supplying water to the boiler immediately onthe concentric pipe being unsealed,

and arresting the said supply directly the water fed in the boilerreseals the said pipe. In order to avoid excess of pressure in theapparatus when closed, the feed-pump is provided with a relief-valve.

Fig. at shows one way of applying this apparatus to a boiler by settingit in a vertical pipe, D, with steam and water nozzles, and in such caseI prefer, as a double security, to apply to this said vertical pipe D aglass water gage of the usual construction.

When applied for regulating the discharge of water, this apparatus isarranged in such a manner that the double-beat valve 1) for thedischarge of the water is open when the level of the waterline closesthe extremity of the concentric tube f, (being the reverse of theibed-regulaton) and closed when the water line unseals the extremity ofthis pipe.

I claim as my invention- 1 The combination of the concentric pipes f andg, for the purpose of admitting the feedwater to the boiler and ofintercepting its passage thereto, arranged as shown and described. a

2. The combination of the diaphragm O", in connection with thedouble-beat valve 1; and the spring 8, for the admission and theinterception of the said feed-water, constructed and arranged as shownand described.

EDUARDO GLAUDIO DA SILVA.

Witnesses:

F. H. BARTLETT, M 1\[EA.

